Final answer:
Perks are a form of compensation encompassing non-wage benefits such as health benefits, retirement plans, and Social Security contributions.
Step-by-step explanation:
The form of compensation that includes special services and benefits for the employee is an A. Perk. A perk is often used to refer to the various non-wage compensations provided to employees in addition to their normal wages or salaries. Examples of perks include health benefits, retirement and savings plans such as defined benefit and defined contribution plans, as well as legally required contributions by the employer to Social Security, unemployment and worker's compensation insurance, and other benefits like Medicare. Perks, thus, fall under the broader category of supplemental pay, which enhances the base salary or wage to improve overall compensation and job satisfaction.